What indicates the location where a service was performed?

The correct answer, which identifies the location where a service was performed, is indeed the revenue code. Revenue codes are specifically designed to provide additional information about the healthcare services billed on a claim. Each revenue code corresponds to a specific type of service and helps to categorize the service based on where it was delivered, such as in a hospital, outpatient facility, or specific department within a healthcare institution.

Given that revenue codes also serve to denote the specific nature or characteristics of the services rendered, they are crucial in ensuring that the appropriate reimbursements are received for services provided in those distinct locations. This allows both payers and providers to clearly understand the context of the care delivered.

In contrast, other options do not serve this purpose: service modality could refer to the technique or method used, diagnostic codes relate to the condition being treated, and billing codes generally pertain to the specific procedures or services rendered, but do not indicate the physical location where those services were provided.